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  2. Addiction psychology - Wikipedia

    en.wikipedia.org/wiki/Addiction_psychology

    The latter reflects physical dependence in which the body adapts to the drug, requiring more of it to achieve a certain effect (tolerance) [25] and eliciting drug-specific physical or mental symptoms if drug use is abruptly ceased (withdrawal). Physical dependence can happen with the chronic use of many drugs—including even appropriate ...

  3. Substance abuse - Wikipedia

    en.wikipedia.org/wiki/Substance_abuse

    Substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods that are harmful to the individual or others. It is a form of substance-related disorder . Differing definitions of drug abuse are used in public health , medical, and criminal justice contexts.

  4. Addictive behavior - Wikipedia

    en.wikipedia.org/wiki/Addictive_behavior

    addictive drug – psychoactive substances that with repeated use are associated with significantly higher rates of substance use disorders, due in large part to the drug's effect on brain reward systems; dependence – an adaptive state associated with a withdrawal syndrome upon cessation of repeated exposure to a stimulus (e.g., drug intake)

  5. Substance use disorder - Wikipedia

    en.wikipedia.org/wiki/Substance_use_disorder

    "Substance use pertains to using select substances such as alcohol, tobacco, illicit drugs, etc. that can cause dependence or harmful side effects."On the other hand, substance abuse is the use of drugs such as prescriptions, over-the-counter medications, or alcohol for purposes other than what they are intended for or using them in excessive ...

  6. Personality theories of addiction - Wikipedia

    en.wikipedia.org/wiki/Personality_theories_of...

    The trait 'positive urgency' has been shown to have a predictive relationship with increases in drinking quantity and alcohol-related problems in college, as well as drug use in college. [18] [21] Furthermore, this trait provides important information on how positive affect can increase the likelihood of engaging in substance abuse.

  7. Addiction - Wikipedia

    en.wikipedia.org/wiki/Addiction

    Drug addiction, which belongs to the class of substance-related disorders, is a chronic and relapsing brain disorder that features drug seeking and drug abuse, despite their harmful effects. [31] This form of addiction changes brain circuitry such that the brain's reward system is compromised, [ 32 ] causing functional consequences for stress ...

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